Location : N. America

This dinosaur just recently lost its name. First discovered and named in 1993, Naashoibitosaurus was the subject of many arguments as to whether it was different enough from other duckbills to deserve its own name. In 2000, after careful examination of the fossils, it was decided that the name Naashoibitosaurus was not going to be used because this dinosaur was actually another Kritosaurus  This is a good example of the ever-changing theories that typify the science of paleontology.